| Bson | 
This module includes a Bson document data structure, together with its encoding (to bytes) and decoding (from bytes).
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| MongoAdmin | 
This is a major client-faced module, for the high level usage.
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| MongoHeader | 
This module defines the header for every message sent to or received from MongoDB.
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| Mongo | 
This is a major client-faced module, for the high level usage.
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| MongoOperation | 
This module defines the types of operation that are used in MongoDB requests and replies.
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| MongoReply | 
This module defines reply that MongoDB sends back for a query.
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| MongoRequest | 
This module create request string that can be sent to MongoDB.
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| MongoSend | 
This module simply define two functions used as underlying low level unix socket output.
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| MongoUtils | 
This module contains some utility tools or helpers
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